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DT125R FORUM

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  4. Urgent: Front wheel bearing size problems!

Urgent: Front wheel bearing size problems!

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  • C Offline
    C Offline
    ChuckSR86
    wrote last edited by
    #1

    Wondered if anyone can kindly help..

    Having a nightmare with wheel bearings in my 2005 dt125 supermoto.

    Took the old wheel bearings out and threw them away and now the caliper side bearing I’m having a howler trying to get one to fit..

    The hub seems to be 40mm ID and my spindle appears to be 15mm

    Yet everywhere I’ve read online says my bearing should have a 17mm internal diameter, the speedo drive side I’ve got a 15mm is bearing, my sleeve is a 15mm ID and I can’t seem to find any bearing which is 40mm x 15mm to fit on the caliper side.

    If I remember correctly (take this with a pinch of salt) that bearing I took out seemed wider than a normal bearing too.

    Any help would be massively appreciated as I’m desperate to get it on the road and this is the only thing holding me back😆

    Cheers guys!

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    • CalumC Offline
      CalumC Offline
      Calum
      wrote last edited by
      #2

      The bearing can still be purchased new from Yamaha: https://www.fowlersparts.co.uk/parts/view/9330620226

      Part Number: 9330620226

      Dimensions: 15mm (internal diameter) x 35mm (external diameter) x 11mm (width).

      Always Originate, Never Pirate!

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      • C Offline
        C Offline
        ChuckSR86
        wrote last edited by
        #3

        Hi Calum,

        Thanks for the reply, I tried the 35mm bearing but it rattles in the hub.. its 5mm too small on the OD as the hub opening is 40mm ID, this is where im becoming a bit stumped...

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        • C Offline
          C Offline
          ChuckSR86
          wrote last edited by
          #4

          shaft.jpg

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          • C Offline
            C Offline
            ChuckSR86
            wrote last edited by
            #5

            shaft.jpg

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            • C Offline
              C Offline
              ChuckSR86
              wrote last edited by
              #6

              IMG_8875.jpeg

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              • CalumC Offline
                CalumC Offline
                Calum
                wrote last edited by Calum
                #7

                And they're definitely off a DTX and not the Saxxes from the WRX? https://www.fowlersparts.co.uk/parts/view/93306-20348

                Dimensions: 17mm (Internal Diameter) x 40mm (Outside Diameter) x 12mm (Width).

                https://simplybearings.co.uk/shop/p5076/SKF-6203-Open-Deep-Groove-Ball-Bearing-17x40x12mm/product_info.html

                Always Originate, Never Pirate!

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                • C Offline
                  C Offline
                  ChuckSR86
                  wrote last edited by
                  #8

                  yeah I believe they are definitely off a DTX. Interstingly enough I have just been reading that the supermoto have a 17mm front axle... and mine is definitely 15mm..

                  My brain is starting to scramble over this! Im wondering how on earth it worked before (really kicking myself for not photographing the bearings before taking them out)

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                  • CalumC Offline
                    CalumC Offline
                    Calum
                    wrote last edited by
                    #9

                    Well it's possible yours is a hybrid system. So it's actually DTR forks with DTR hubs laced onto excel rims.

                    Again, it's an old bike so it's possible it's been modified.

                    Always Originate, Never Pirate!

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